20121200984 has 8 divisors (see below), whose sum is σ = 37727251860. Its totient is φ = 10060600488.

The previous prime is 20121200977. The next prime is 20121200989. The reversal of 20121200984 is 48900212102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121200989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257575054 + ... + 1257575069.

Almost surely, 2^20121200984 is an apocalyptic number.

It is an amenable number.

20121200984 is a deficient number, since it is larger than the sum of its proper divisors (17606050876).

20121200984 is a wasteful number, since it uses less digits than its factorization.

20121200984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515150129 (or 2515150125 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 20121200984 in words is "twenty billion, one hundred twenty-one million, two hundred thousand, nine hundred eighty-four".