10211102109978 has 128 divisors (see below), whose sum is σ = 25515874492416. Its totient is φ = 2646570931200.

The previous prime is 10211102109959. The next prime is 10211102110007. The reversal of 10211102109978 is 87990120111201.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 453593743 + ... + 453616253.

It is an arithmetic number, because the mean of its divisors is an integer number (199342769472).

Almost surely, 2^{10211102109978} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10211102109978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12757937246208).

10211102109978 is an abundant number, since it is smaller than the sum of its proper divisors (15304772382438).

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

10211102109978 is a wasteful number, since it uses less digits than its factorization.

10211102109978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24588.

The product of its (nonzero) digits is 18144, while the sum is 42.

The spelling of 10211102109978 in words is "ten trillion, two hundred eleven billion, one hundred two million, one hundred nine thousand, nine hundred seventy-eight".