102121221948 has 12 divisors (see below), whose sum is σ = 238282851240. Its totient is φ = 34040407312.

The previous prime is 102121221947. The next prime is 102121221949. The reversal of 102121221948 is 849122121201.

It is an interprime number because it is at equal distance from previous prime (102121221947) and next prime (102121221949).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121221947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4255050903 + ... + 4255050926.

It is an arithmetic number, because the mean of its divisors is an integer number (19856904270).

Almost surely, 2^102121221948 is an apocalyptic number.

It is an amenable number.

102121221948 is an abundant number, since it is smaller than the sum of its proper divisors (136161629292).

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

102121221948 is a wasteful number, since it uses less digits than its factorization.

102121221948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8510101836 (or 8510101834 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The spelling of 102121221948 in words is "one hundred two billion, one hundred twenty-one million, two hundred twenty-one thousand, nine hundred forty-eight".