1211121101210 has 16 divisors (see below), whose sum is σ = 2180071564776. Its totient is φ = 484436533248.

The previous prime is 1211121101119. The next prime is 1211121101213. The reversal of 1211121101210 is 121011211121.

It can be written as a sum of positive squares in 4 ways, for example, as 1118321055049 + 92800046161 = 1057507^2 + 304631^2 .

It is a super-2 number, since 2×1211121101210² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211121101213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055207 + ... + 1880346.

Almost surely, 2^{1211121101210} is an apocalyptic number.

1211121101210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211121101210 is a deficient number, since it is larger than the sum of its proper divisors (968950463566).

1211121101210 is a wasteful number, since it uses less digits than its factorization.

1211121101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976817.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1211121101210 its reverse (121011211121), we get a palindrome (1332132312331).

The spelling of 1211121101210 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, one hundred one thousand, two hundred ten".