1211201011010 has 32 divisors (see below), whose sum is σ = 2214662808960. Its totient is φ = 476826337152.

The previous prime is 1211201010991. The next prime is 1211201011021. The reversal of 1211201011010 is 101101021121.

It is a super-2 number, since 2×1211201011010² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211201010982 and 1211201011000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44174 + ... + 1557033.

It is an arithmetic number, because the mean of its divisors is an integer number (69208212780).

Almost surely, 2^{1211201011010} is an apocalyptic number.

1211201011010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211201011010 is a deficient number, since it is larger than the sum of its proper divisors (1003461797950).

1211201011010 is a wasteful number, since it uses less digits than its factorization.

1211201011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602410.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1211201011010 its reverse (101101021121), we get a palindrome (1312302032131).

The spelling of 1211201011010 in words is "one trillion, two hundred eleven billion, two hundred one million, eleven thousand, ten".