1211996010 has 32 divisors (see below), whose sum is σ = 2919543552. Its totient is φ = 322004160.

The previous prime is 1211995999. The next prime is 1211996059. The reversal of 1211996010 is 106991121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66409 + ... + 82668.

It is an arithmetic number, because the mean of its divisors is an integer number (91235736).

Almost surely, 2^1211996010 is an apocalyptic number.

1211996010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211996010 is an abundant number, since it is smaller than the sum of its proper divisors (1707547542).

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

1211996010 is a wasteful number, since it uses less digits than its factorization.

1211996010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149358.

The product of its (nonzero) digits is 972, while the sum is 30.

The square root of 1211996010 is about 34813.7330661335. The cubic root of 1211996010 is about 1066.1878522637.

The spelling of 1211996010 in words is "one billion, two hundred eleven million, nine hundred ninety-six thousand, ten".