40001022211212 has 96 divisors (see below), whose sum is σ = 104293243353600. Its totient is φ = 13258227614400.

The previous prime is 40001022211193. The next prime is 40001022211247. The reversal of 40001022211212 is 21211222010004.

40001022211212 is a `hidden beast` number, since 400 + 0 + 10 + 22 + 21 + 1 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298825137 + ... + 298958967.

It is an arithmetic number, because the mean of its divisors is an integer number (1086387951600).

Almost surely, 2^{40001022211212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40001022211212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52146621676800).

40001022211212 is an abundant number, since it is smaller than the sum of its proper divisors (64292221142388).

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

40001022211212 is a wasteful number, since it uses less digits than its factorization.

40001022211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149484 (or 149476 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 40001022211212 its reverse (21211222010004), we get a palindrome (61212244221216).

The spelling of 40001022211212 in words is "forty trillion, one billion, twenty-two million, two hundred eleven thousand, two hundred twelve".