4201821991070 has 32 divisors (see below), whose sum is σ = 8442730707840. Its totient is φ = 1492401889440.

The previous prime is 4201821991043. The next prime is 4201821991079. The reversal of 4201821991070 is 701991281024.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4201821991079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444162500 + ... + 444171959.

It is an arithmetic number, because the mean of its divisors is an integer number (263835334620).

Almost surely, 2^{4201821991070} is an apocalyptic number.

4201821991070 is an abundant number, since it is smaller than the sum of its proper divisors (4240908716770).

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

4201821991070 is a wasteful number, since it uses less digits than its factorization.

4201821991070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888334520.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 4201821991070 in words is "four trillion, two hundred one billion, eight hundred twenty-one million, nine hundred ninety-one thousand, seventy".