1212121032 has 16 divisors (see below), whose sum is σ = 3030302640. Its totient is φ = 404040336.

The previous prime is 1212120991. The next prime is 1212121037. The reversal of 1212121032 is 2301212121.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1212121037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25252498 + ... + 25252545.

It is an arithmetic number, because the mean of its divisors is an integer number (189393915).

Almost surely, 2^1212121032 is an apocalyptic number.

1212121032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212121032 is an abundant number, since it is smaller than the sum of its proper divisors (1818181608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212121032 is a wasteful number, since it uses less digits than its factorization.

1212121032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50505052 (or 50505048 counting only the distinct ones).

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

The square root of 1212121032 is about 34815.5286043455. The cubic root of 1212121032 is about 1066.2245114478.

Adding to 1212121032 its reverse (2301212121), we get a palindrome (3513333153).

It can be divided in two parts, 12121 and 21032, that added together give a triangular number (33153 = T₂₅₇).

The spelling of 1212121032 in words is "one billion, two hundred twelve million, one hundred twenty-one thousand, thirty-two".