129011121211 has 8 divisors (see below), whose sum is σ = 156114298080. Its totient is φ = 104076198528.

The previous prime is 129011121181. The next prime is 129011121251. The reversal of 129011121211 is 112121110921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129011121211 - 2⁹ = 129011120699 is a prime.

It is a super-2 number, since 2×129011121211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129011121251) 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, 542063416 + ... + 542063653.

It is an arithmetic number, because the mean of its divisors is an integer number (19514287260).

Almost surely, 2^129011121211 is an apocalyptic number.

129011121211 is a deficient number, since it is larger than the sum of its proper divisors (27103176869).

129011121211 is a wasteful number, since it uses less digits than its factorization.

129011121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084127093.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 129011121211 in words is "one hundred twenty-nine billion, eleven million, one hundred twenty-one thousand, two hundred eleven".