202122101021220 has 144 divisors (see below), whose sum is σ = 632068280363520. Its totient is φ = 52243089516288.

The previous prime is 202122101021053. The next prime is 202122101021227. The reversal of 202122101021220 is 22120101221202.

It is a happy number.

202122101021220 is a `hidden beast` number, since 2 + 0 + 212 + 210 + 1 + 0 + 21 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 202122101021193 and 202122101021202.

It is not an unprimeable number, because it can be changed into a prime (202122101021227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55945500 + ... + 59448659.

It is an arithmetic number, because the mean of its divisors is an integer number (4389363058080).

Almost surely, 2^{202122101021220} is an apocalyptic number.

202122101021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202122101021220 is an abundant number, since it is smaller than the sum of its proper divisors (429946179342300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202122101021220 is a wasteful number, since it uses less digits than its factorization.

202122101021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115394474 (or 115394469 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 202122101021220 its reverse (22120101221202), we get a palindrome (224242202242422).

The spelling of 202122101021220 in words is "two hundred two trillion, one hundred twenty-two billion, one hundred one million, twenty-one thousand, two hundred twenty".