1211212104 has 16 divisors (see below), whose sum is σ = 3028030320. Its totient is φ = 403737360.

The previous prime is 1211212063. The next prime is 1211212117. The reversal of 1211212104 is 4012121121.

It is a super-2 number, since 2×1211212104² = 2934069521752213632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25233562 + ... + 25233609.

It is an arithmetic number, because the mean of its divisors is an integer number (189251895).

Almost surely, 2^1211212104 is an apocalyptic number.

It is an amenable number.

1211212104 is an abundant number, since it is smaller than the sum of its proper divisors (1816818216).

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

1211212104 is a wasteful number, since it uses less digits than its factorization.

1211212104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50467180 (or 50467176 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1211212104 is about 34802.4726707744. The cubic root of 1211212104 is about 1065.9579364042.

Adding to 1211212104 its reverse (4012121121), we get a palindrome (5223333225).

The spelling of 1211212104 in words is "one billion, two hundred eleven million, two hundred twelve thousand, one hundred four".