11211000988 has 72 divisors (see below), whose sum is σ = 21921051600. Its totient is φ = 4975119360.

The previous prime is 11211000973. The next prime is 11211001003. The reversal of 11211000988 is 88900011211.

It is an interprime number because it is at equal distance from previous prime (11211000973) and next prime (11211001003).

It is a super-2 number, since 2×11211000988² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32123038 + ... + 32123386.

It is an arithmetic number, because the mean of its divisors is an integer number (304459050).

Almost surely, 2^11211000988 is an apocalyptic number.

It is an amenable number.

11211000988 is a deficient number, since it is larger than the sum of its proper divisors (10710050612).

11211000988 is a wasteful number, since it uses less digits than its factorization.

11211000988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 31.

The spelling of 11211000988 in words is "eleven billion, two hundred eleven million, nine hundred eighty-eight", and thus it is an aban number.