202121001221202 has 24 divisors (see below), whose sum is σ = 500490098262336. Its totient is φ = 57748857491736.

The previous prime is 202121001221201. The next prime is 202121001221213. The reversal of 202121001221202 is 202122100121202.

It is a happy number.

202121001221202 is a `hidden beast` number, since 20 + 212 + 10 + 0 + 1 + 221 + 202 = 666.

It is a super-2 number, since 2×202121001221202² (a number of 29 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (202121001221201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 802067465038 + ... + 802067465289.

It is an arithmetic number, because the mean of its divisors is an integer number (20853754094264).

Almost surely, 2^{202121001221202} is an apocalyptic number.

202121001221202 is an abundant number, since it is smaller than the sum of its proper divisors (298369097041134).

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

202121001221202 is a wasteful number, since it uses less digits than its factorization.

202121001221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604134930342 (or 1604134930339 counting only the distinct ones).

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

Adding to 202121001221202 its reverse (202122100121202), we get a palindrome (404243101342404).

The spelling of 202121001221202 in words is "two hundred two trillion, one hundred twenty-one billion, one million, two hundred twenty-one thousand, two hundred two".