1200001222131 has 32 divisors (see below), whose sum is σ = 1683859570176. Its totient is φ = 759152736000.

The previous prime is 1200001222127. The next prime is 1200001222169. The reversal of 1200001222131 is 1312221000021.

It is not a de Polignac number, because 1200001222131 - 2² = 1200001222127 is a prime.

It is a super-2 number, since 2×1200001222131² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1200001222131.

It is not an unprimeable number, because it can be changed into a prime (1200001222031) 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, 14846016 + ... + 14926626.

It is an arithmetic number, because the mean of its divisors is an integer number (52620611568).

Almost surely, 2^{1200001222131} is an apocalyptic number.

1200001222131 is a deficient number, since it is larger than the sum of its proper divisors (483858348045).

1200001222131 is a wasteful number, since it uses less digits than its factorization.

1200001222131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83963.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1200001222131 its reverse (1312221000021), we get a palindrome (2512222222152).

The spelling of 1200001222131 in words is "one trillion, two hundred billion, one million, two hundred twenty-two thousand, one hundred thirty-one".