1211150020 has 24 divisors (see below), whose sum is σ = 2562835968. Its totient is φ = 480760800.

The previous prime is 1211150009. The next prime is 1211150033. The reversal of 1211150020 is 200511121.

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, 228516 + ... + 233755.

It is an arithmetic number, because the mean of its divisors is an integer number (106784832).

Almost surely, 2^1211150020 is an apocalyptic number.

1211150020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211150020 is an abundant number, since it is smaller than the sum of its proper divisors (1351685948).

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

1211150020 is a wasteful number, since it uses less digits than its factorization.

1211150020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462411 (or 462409 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 1211150020 is about 34801.5807112263. The cubic root of 1211150020 is about 1065.9397232267.

Adding to 1211150020 its reverse (200511121), we get a palindrome (1411661141).

The spelling of 1211150020 in words is "one billion, two hundred eleven million, one hundred fifty thousand, twenty".