22012202121 has 32 divisors (see below), whose sum is σ = 36142713600. Its totient is φ = 11604363264.

The previous prime is 22012202117. The next prime is 22012202239. The reversal of 22012202121 is 12120221022.

It is not a de Polignac number, because 22012202121 - 2² = 22012202117 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22012202121.

It is not an unprimeable number, because it can be changed into a prime (22012202521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 489805 + ... + 532853.

It is an arithmetic number, because the mean of its divisors is an integer number (1129459800).

Almost surely, 2^22012202121 is an apocalyptic number.

22012202121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22012202121 is a deficient number, since it is larger than the sum of its proper divisors (14130511479).

22012202121 is a wasteful number, since it uses less digits than its factorization.

22012202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44945.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22012202121 its reverse (12120221022), we get a palindrome (34132423143).

The spelling of 22012202121 in words is "twenty-two billion, twelve million, two hundred two thousand, one hundred twenty-one".