1201155061020 has 96 divisors (see below), whose sum is σ = 3636839098368. Its totient is φ = 295052178432.

The previous prime is 1201155061013. The next prime is 1201155061031. The reversal of 1201155061020 is 201605511021.

It is a super-2 number, since 2×1201155061020² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 12479752 + ... + 12575631.

It is an arithmetic number, because the mean of its divisors is an integer number (37883740608).

Almost surely, 2^{1201155061020} is an apocalyptic number.

1201155061020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201155061020 is an abundant number, since it is smaller than the sum of its proper divisors (2435684037348).

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

1201155061020 is a wasteful number, since it uses less digits than its factorization.

1201155061020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25055459 (or 25055457 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

The spelling of 1201155061020 in words is "one trillion, two hundred one billion, one hundred fifty-five million, sixty-one thousand, twenty".