211404101240 has 32 divisors (see below), whose sum is σ = 483721254000. Its totient is φ = 83128391424.

The previous prime is 211404101219. The next prime is 211404101261. The reversal of 211404101240 is 42101404112.

It is an interprime number because it is at equal distance from previous prime (211404101219) and next prime (211404101261).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44786645 + ... + 44791364.

Almost surely, 2^211404101240 is an apocalyptic number.

211404101240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211404101240 is an abundant number, since it is smaller than the sum of its proper divisors (272317152760).

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

211404101240 is a wasteful number, since it uses less digits than its factorization.

211404101240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89578079 (or 89578075 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 211404101240 its reverse (42101404112), we get a palindrome (253505505352).

The spelling of 211404101240 in words is "two hundred eleven billion, four hundred four million, one hundred one thousand, two hundred forty".