210121202122 has 32 divisors (see below), whose sum is σ = 357337048320. Its totient is φ = 91863046080.

The previous prime is 210121202101. The next prime is 210121202147. The reversal of 210121202122 is 221202121012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 210121202096 and 210121202105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4616508 + ... + 4661800.

It is an arithmetic number, because the mean of its divisors is an integer number (11166782760).

Almost surely, 2^210121202122 is an apocalyptic number.

210121202122 is a deficient number, since it is larger than the sum of its proper divisors (147215846198).

210121202122 is a wasteful number, since it uses less digits than its factorization.

210121202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54718.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210121202122 its reverse (221202121012), we get a palindrome (431323323134).

The spelling of 210121202122 in words is "two hundred ten billion, one hundred twenty-one million, two hundred two thousand, one hundred twenty-two".