210122101220 has 24 divisors (see below), whose sum is σ = 441276521784. Its totient is φ = 84045010176.

The previous prime is 210122101219. The next prime is 210122101229. The reversal of 210122101220 is 22101221012.

It can be written as a sum of positive squares in 4 ways, for example, as 15203383204 + 194918718016 = 123302^2 + 441496^2 .

It is a super-2 number, since 2×210122101220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210122101195 and 210122101204.

It is not an unprimeable number, because it can be changed into a prime (210122101229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233192 + ... + 688928.

It is an arithmetic number, because the mean of its divisors is an integer number (18386521741).

Almost surely, 2^210122101220 is an apocalyptic number.

210122101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210122101220 is an abundant number, since it is smaller than the sum of its proper divisors (231154420564).

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

210122101220 is a wasteful number, since it uses less digits than its factorization.

210122101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478799 (or 478797 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210122101220 its reverse (22101221012), we get a palindrome (232223322232).

The spelling of 210122101220 in words is "two hundred ten billion, one hundred twenty-two million, one hundred one thousand, two hundred twenty".