2187901698901 has 32 divisors (see below), whose sum is σ = 2309748480000. Its totient is φ = 2069706437568.

The previous prime is 2187901698889. The next prime is 2187901698907. The reversal of 2187901698901 is 1098961097812.

It is a cyclic number.

It is not a de Polignac number, because 2187901698901 - 2²¹ = 2187899601749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2187901698901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187901698907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106389646 + ... + 106410208.

It is an arithmetic number, because the mean of its divisors is an integer number (72179640000).

Almost surely, 2^{2187901698901} is an apocalyptic number.

It is an amenable number.

2187901698901 is a deficient number, since it is larger than the sum of its proper divisors (121846781099).

2187901698901 is a wasteful number, since it uses less digits than its factorization.

2187901698901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21073.

The product of its (nonzero) digits is 3919104, while the sum is 61.

The spelling of 2187901698901 in words is "two trillion, one hundred eighty-seven billion, nine hundred one million, six hundred ninety-eight thousand, nine hundred one".