123212122029 has 20 divisors (see below), whose sum is σ = 184861387260. Its totient is φ = 81782706240.

The previous prime is 123212121979. The next prime is 123212122031. The reversal of 123212122029 is 920221212321.

It can be written as a sum of positive squares in 2 ways, for example, as 92111036004 + 31101086025 = 303498^2 + 176355^2 .

It is not a de Polignac number, because 123212122029 - 2¹² = 123212117933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 123212121993 and 123212122011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212122829) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3302712 + ... + 3339809.

It is an arithmetic number, because the mean of its divisors is an integer number (9243069363).

Almost surely, 2^123212122029 is an apocalyptic number.

It is an amenable number.

123212122029 is a deficient number, since it is larger than the sum of its proper divisors (61649265231).

123212122029 is an equidigital number, since it uses as much as digits as its factorization.

123212122029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6642762 (or 6642753 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 123212122029 in words is "one hundred twenty-three billion, two hundred twelve million, one hundred twenty-two thousand, twenty-nine".