1212011983 has 32 divisors (see below), whose sum is σ = 1530869760. Its totient is φ = 933984000.

The previous prime is 1212011951. The next prime is 1212011987. The reversal of 1212011983 is 3891102121.

It is not a de Polignac number, because 1212011983 - 2⁵ = 1212011951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212011987) 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, 1072963 + ... + 1074091.

It is an arithmetic number, because the mean of its divisors is an integer number (47839680).

Almost surely, 2^1212011983 is an apocalyptic number.

1212011983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1212011983 is a deficient number, since it is larger than the sum of its proper divisors (318857777).

1212011983 is a wasteful number, since it uses less digits than its factorization.

1212011983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 1212011983 is about 34813.9624719738. The cubic root of 1212011983 is about 1066.1925360370.

The spelling of 1212011983 in words is "one billion, two hundred twelve million, eleven thousand, nine hundred eighty-three".