11021012121220 has 24 divisors (see below), whose sum is σ = 24505544599704. Its totient is φ = 4149086916096.

The previous prime is 11021012121187. The next prime is 11021012121233. The reversal of 11021012121220 is 2212121012011.

It can be written as a sum of positive squares in 4 ways, for example, as 1498406120836 + 9522606000384 = 1224094^2 + 3085872^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11021012121194 and 11021012121203.

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, 16207370427 + ... + 16207371106.

It is an arithmetic number, because the mean of its divisors is an integer number (1021064358321).

Almost surely, 2^{11021012121220} is an apocalyptic number.

11021012121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11021012121220 is an abundant number, since it is smaller than the sum of its proper divisors (13484532478484).

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

11021012121220 is a wasteful number, since it uses less digits than its factorization.

11021012121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32414741559 (or 32414741557 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11021012121220 its reverse (2212121012011), we get a palindrome (13233133133231).

The spelling of 11021012121220 in words is "eleven trillion, twenty-one billion, twelve million, one hundred twenty-one thousand, two hundred twenty".